I think what makes people upset about Museum games taking a long time is that MoH drastically changes the game’s dynamic: if you’re a runner who can’t secure the win, you have an advantage running out the clock. It turns the passive late game runner plays into a liability instead of a strength. It’s not just that the Corp is prolonging the game but it’s prolonging it in a way that shifts the burden of closing out the game onto the runner.
IG kill has basically replaced Cambridge for me as my go to tournament kill deck because it forces the runner to play into my strategy more. Museum cuts down on my odds of seeing Mushin+Ronin but gives the deck a lot more lasting power, which can sometimes be a problem with PE nowadays. And like Cambridge, I find most games ending quickly and games I need to grind out not taking overly long.